.px2rem(@name, @px){
    @{name}: @px / 75 * 1rem;
}
.header{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    .px2rem(height, 136);
    .px2rem(line-height, 136);
    background: black;
    color: white;
    .px2rem(font-size, 36);
    z-index: 110;
    h3{
        position: absolute;
        text-align: center;
        width: 100%;
    }
    .right{
        color: white;
        position: absolute;
        right: 3%;
    }
}

.box{
    .px2rem(margin-top, 136);
    a{
        img{
            width: 96%;
            margin-left: 2%;
            .px2rem(margin-top, 24);
        }
    }
}